CN107135527B

CN107135527B - Signal transmission method, terminal and network side equipment

Info

Publication number: CN107135527B
Application number: CN201610108125.5A
Authority: CN
Inventors: 薛妍; 郝鹏; 张峻峰; 鲁照华; 李剑; 晏潇; 陆海涛
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-02-26
Filing date: 2016-02-26
Publication date: 2021-07-02
Anticipated expiration: 2036-02-26
Also published as: WO2017143989A1; US20190059043A1; US11076343B2; CN107135527A

Abstract

A first network side device sends access configuration AC indication information to a terminal, wherein the AC indication information is used for indicating a currently available AC in an access configuration set ACS to the terminal. The method comprises the steps that a terminal receives an access configuration set ACS and access configuration AC indication information sent by network side equipment, and the currently available AC in the ACS is determined according to the AC indication information. The method and the device can realize the transmission and indication of the AC, have low cost and small interference, and can meet the requirements of a novel wireless access system such as a 5G wireless access system. Further, the wake-up mechanism may be supported when the transmission node is networked in isolation.

Description

Signal transmission method, terminal and network side equipment

Technical Field

The present invention relates to communication technologies, and in particular, to a signal transmission method, a terminal, and a network side device.

Background

At present, the main demand of mobile communication is from the development of mobile internet, and especially the development of intelligent terminals has spurred a dramatic increase in mobile communication data traffic. In 2020 and the future, mobile internet and internet of things services will become the main driving force for the development of mobile communication. The third Generation Partnership Project (3rd Generation Partnership Project, 3GPP) proposes a Heterogeneous network (Heterogeneous Networks) in the Long-Term Evolution advanced (Long-Term Evolution, LTE-a) system, and introduces the enhanced function of a Small cell (Small cell). However, it is generally assumed that Small cells have no more than 4 or 10 cells under the same coverage of a macro base station, and this density is far from sufficient with respect to the capacity requirement of the next 10 years. The fifth Generation mobile communication technology (5rd Generation, abbreviated as 5G) provides requirements for improving spectrum efficiency, increasing network density, increasing system bandwidth, intelligent service distribution, and reducing system broadcast control overhead. Ultra Dense Networks (UDNs) are proposed in this context. In the UDN network, the density of transmission nodes (TP) is very large (several tens to several hundreds of TPs are included in one macro base station). The coverage of TPs is further reduced (tens of meters, even tens of meters), each TP may serve only one or a few users, TPs without users enter a sleep or off state, TPs may be low power base stations (also known as small stations), relay stations, etc. Therefore, the 5G system needs to consider a user-centered access mode, and respond when the user has a demand, so as to achieve the purposes of saving energy of the base station and reducing inter-cell interference.

For a conventional Long-Term Evolution system (Long-Term Evolution, LTE for short) network, a cell discovery and user access mechanism is as follows: each cell needs to transmit a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) in a period of 5ms, and the UE detects the PSS to obtain Synchronization and cell identification; each Cell transmits a Cell-specific Reference Signal (CRS for short) on a plurality of symbols of each 1ms subframe, a user measures the CRS to obtain Reference Signal Received Power (RSRP for short), and a serving Cell is selected; each cell broadcasts a Master Information Block (MIB) to all UEs in the cell via a broadcast Channel PBCH in a period of 10ms, and transmits a Physical Downlink Shared Channel (PDSCH) with a System Information Block (SIB) at a high frequency; after the User Equipment (User Equipment, abbreviated as UE) successfully detects the system information from these channels, it obtains an uplink Access Configuration (AC), and then performs uplink access.

In a 3gpp Release12small cell, a cell Discovery Reference Signal (DRS) and an on/off mechanism of the small cell (also used for representing a corresponding small base station) are introduced to reduce power overhead and reduce inter-cell interference. And if no service requirement exists, the small cell transmits DRS signals by using a period of 40ms or more, transmits system information at high frequency, and closes other signal transmission. And when the terminal detects the DRS, the small cell opens normal signal transmission and performs service transmission. Under the mechanism, resource overhead and adjacent cell interference are still large. In addition, after the terminal detects the DRS, the macro base station needs to be informed and awaken the small cell by the macro base station. For 5G system, the system can be isolated and networked, and cannot depend on the former network, and the awakening mechanism is not available.

Disclosure of Invention

In view of this, the present invention provides the following.

A method of signal transmission, comprising:

the first network side equipment sends access configuration AC indication information to the terminal, wherein the AC indication information is used for indicating the currently available AC in the ACS to the terminal.

A method of signal transmission, comprising:

the method comprises the steps that a terminal receives an access configuration set ACS and access configuration AC indication information sent by network side equipment, wherein the AC indication information is used for indicating a currently available AC in the ACS;

and the terminal determines the currently available AC in the ACS according to the AC indication information.

A first network-side device comprising an AC indication module, the AC indication module comprising:

the information acquisition unit is used for acquiring access configuration AC indication information, and the AC indication information is used for indicating the currently available AC in an ACS to a terminal;

and the information sending unit is used for sending the AC indication information to the terminal.

A second network side device, comprising an access configuration set ACS sending module and/or an auxiliary information sending module, wherein:

the ACS sending module includes:

an ACS acquiring unit configured to acquire one or more ACS to be transmitted to a terminal;

an ACS sending unit, configured to send the acquired ACS to a terminal;

the auxiliary information sending module comprises:

the information acquisition unit is used for acquiring auxiliary information, wherein the auxiliary information is used for assisting a terminal to receive one or more of a Discovery Reference Signal (DRS), an Access Configuration (AC) and an Access Configuration (ACS);

and the information sending unit is used for sending the acquired auxiliary information to the terminal.

A terminal comprising an AC processing module, the AC processing module comprising:

the information receiving unit is used for receiving an access configuration set ACS and access configuration AC indication information sent by network side equipment, wherein the AC indication information is used for indicating a currently available AC in the ACS;

an information determining unit, configured to determine, according to the AC indication information, an AC currently available in the ACs.

The signal transmission method, the terminal and the network side equipment can realize the transmission and indication of the AC, have low cost and small interference, and can meet the requirements of a novel wireless access system such as a 5G wireless access system. Further, the wake-up mechanism may be supported when the transmission node is networked in isolation.

Drawings

FIG. 1 is an exemplary networking diagram of a UDN network;

fig. 2 is a flowchart of a signal transmission method of a network side device according to an embodiment of the present invention;

fig. 3 is a block diagram of a first network-side device according to an embodiment of the present invention;

fig. 4 is a block diagram of a second network-side device according to an embodiment of the present invention;

fig. 5 is a flowchart of a signal transmission method of a second terminal according to an embodiment of the present invention;

fig. 6 is a block diagram of a second terminal according to an embodiment of the present invention;

fig. 7 is a flowchart of a signal transmission method of a third network device according to an embodiment of the present invention;

fig. 8 is a block diagram of a third first network-side device according to the embodiment of the present invention;

fig. 9 is a flowchart of a signal transmission method of a four-terminal according to an embodiment of the present invention;

FIG. 10 is a diagram illustrating an ACS lookup in accordance with the present invention;

FIG. 11 is a diagram of an exemplary two ACS lookup of the present invention;

FIG. 12 is a diagram of an exemplary three ACS lookup of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

Example one

The networking environment of this embodiment may be a coexistence of a conventional Radio Access system and a new Radio Access Technology (new RAT) system, or may be all of the new RAT systems. The conventional wireless access system can be, for example, a CDMA system, an LTE system (including LTE-a), a UMTS system, an 802.11 system, a GSM system, and the like. A new radio access system, such as the one in 5G, where one or more TPs form a TP cluster. In addition, the networking environment of this embodiment includes one or more macro base stations, where multiple TP clusters exist in a service area of the macro base station, and each TP cluster includes one or more TPs. Fig. 1 is an example of the networking, showing a Macro base station (Macro eNB) with 2 TP clusters within its service area. There are 3 TPs in cluster 1 and 1 TP in cluster 2.

In this embodiment, one or more ACS is configured for terminal access, each ACS includes one or more ACS, and one TP cluster may configure one or more ACS for use when a terminal under the TP cluster accesses a TP in the cluster. In particular, the ACS and the AC may be configured according to conventions in the protocol or corresponding configuration policies. As are other embodiments. Under the configuration, how the network side device reasonably sends the ACS and the necessary indication information needs to provide a corresponding scheme.

The AC includes access parameters configured for terminal access. In this embodiment, the AC includes resource information of the first resource and/or resource information of the second resource. The first resource is a resource used by the terminal to send the access request message, the second resource is a resource used by the first network side device to send a response message in response to the access request message of the terminal, the resource information may indicate a resource actually used by the message or indicate a resource range in which the actually used resource is located, and the resource includes at least one of a time domain resource, a frequency domain resource, a space domain resource and a code domain resource. For example, if the system is a time-frequency domain communication system similar to LTE or OFDMA, the resources include specific time-frequency domain positions, sizes, and the like, and if a request signal similar to a random access preamble is used, the resources also include preamble codeword resources. If the resource range representation is adopted, the terminal needs to randomly select available resources within the resource indication range by itself and send an access request on the resources.

In particular, in an example, the resource information of the second resource is implicitly indicated by the resource information of the first resource and an agreed positional relationship, e.g., a positional relationship in a time domain, between the second resource and the first resource.

In this embodiment, the DRS is a DRS in a novel wireless access system, such as 5G, and is used for one or more of AC information indication, cell discovery, channel estimation, channel measurement, and coarse synchronization. The DRS is different from the DRS defined by the LTE-a system, such as not including one or more of wideband CRS, CSI-RS (Channel State Information Reference Signal, also called Channel State Information Reference Signal), PSS, SSS, and the like. As are other embodiments. The coarse synchronization comprises coarse time, frequency and phase synchronization, the uplink sending time is adjusted according to the DRS measurement result, and Automatic Frequency Control (AFC) is carried out so as to meet the precondition for further carrying out precise synchronization. In other embodiments, the ACS and DRS may be the same as this embodiment.

In the signal transmission method of this embodiment, the first network side device sends the AC indication information but does not send the ACs, and the second network side device sends the ACs.

As shown in fig. 2, the method includes:

step 110, a first network side device sends AC indication information to a terminal, wherein the AC indication information is used for indicating a currently available AC in an ACS to the terminal;

in this embodiment, the first network side device is a transmission node, but the present invention is not limited thereto. The AC indication information includes one or more of ACS identification information and AC identification information. For example, if a second network side device sends multiple ACS, each ACS has its own ACS ID, that is, ACS identification information, the AC indication information sent by the first network side device in the service area of the second network side device may include ACS IDs of available ACS, and the terminal determines the available ACS from the received multiple ACS according to the received ACS ID. However, when the ACS ID is sent by the second network side device, and when the ACS under different ACS have different AC identification information, the AC indication information may not include the ACS identification information. The AC identification information may include AC indexes, one AC index corresponding to a unique AC; however, the AC identification information may also adopt DRS identification, and the DRS identification may directly identify the AC or indirectly identify the AC by using a one-to-one or many-to-one mapping relationship between the DRS identification and the AC index. After receiving the DRS sequence, the terminal can identify the corresponding DRS identifier, and thus the DRS sequence can also be used to identify the AC.

In this step, the first network side device carries or indicates the AC indication information through the DRS, which may specifically adopt the following manner:

the first network side device sends DRS, and the DRS is used as the AC indication information; or

The first network side device sends a Discovery Reference Signal (DRS) comprising a sequence part and a load part, and the AC indication information is carried in the load part of the DRS; or

And the first network side equipment sends DRS and the AC indication information on different resources, wherein the DRS carries or does not carry the information of the resources used by the AC indication information.

In this embodiment, the DRS is a DRS in a novel wireless access system, and is used for one or more of AC information indication, cell discovery, channel estimation, channel measurement, and coarse synchronization. It should be noted that the DRS of the present application may be the same as or different from the DRS in the LTE system, for example, the DRS in this embodiment does not include PSS and SSS, but may be used to achieve coarse synchronization.

In this embodiment, when the transmission node cluster includes a plurality of transmission nodes, only one transmission node or some transmission nodes in the cluster transmit the DRS signal, and other transmission nodes without service requirements are dormant and do not transmit the DRS signal, and the dormant transmission node is awakened after detecting the access request message of the terminal on the resource designated by the AC. Or, only one transmission node or a part of transmission nodes in the cluster may transmit the DRS signal and the system information, other transmission nodes without service requirement are dormant and do not transmit the system information, and the dormant transmission node is awakened after detecting the access request message of the terminal on the resource specified by the AC. Therefore, compared with the prior art, the overhead in the TP dormant state is smaller and more power-saving, and the dormant TP is awakened in response to the terminal access without being notified by the macro base station, so that the TP can still be awakened even in the scene without the macro base station or without connection with the macro base station.

Step 120, the second network side device sends one or more ACS to the terminal.

The transmission of the first network side device and the transmission of the second network side device in the above steps 110 and 120 may be performed separately, and there is no context.

In this embodiment, the second network side device may send the ACS as system information to a terminal, for example, send the ACS on a broadcast channel or a PDSCH or other channels.

In this embodiment, the second network side device is a macro base station whose service area covers one or more transmission node clusters, and the macro base station is a macro base station in a conventional wireless access system or a novel wireless access system. The ACS sent by the second network-side device to the terminal may include all ACS used in the network, or may include only all ACS used in a set area, where the set area includes a service area of one or more second network-side devices.

In this embodiment, the second network side device further sends, to the terminal, first auxiliary information for DRS reception, where the first auxiliary information includes one or more of the following information: information of resources used by the DRS, a transmission period of the DRS, and identification information of the DRS to be received.

In this embodiment, the AC identification information is only sent in the cluster, the sending frequency of the AC identification information may be much lower than the frequency of the macro base station sending the ACs, and sending the ACs and the AC indication information in a hierarchical manner is beneficial to controlling the message sending frequencies on different layers, so as to shorten the TP on time and perform more effective green energy saving management. In this embodiment, the ACS and/or AC identification information may be physical layer signaling or higher layer signaling. The resources used for ACS and/or AC indication information transmission may be fixed resources or may be semi-statically adjusted.

The present embodiment further provides a first network-side device, including an AC indication module, as shown in fig. 3, where the AC indication module includes:

an information obtaining unit 10, configured to obtain AC indication information of access configuration, where the AC indication information is used to indicate, to a terminal, a currently available AC in an ACs;

an information sending unit 20, configured to send the AC indication information to a terminal.

Alternatively,

the information sending unit sends AC indication information to the terminal, and the AC indication information comprises the following steps:

the information sending unit sends a Discovery Reference Signal (DRS), and the DRS is used as the AC indication information; or

The information sending unit sends DRS, and the load part of the DRS carries the AC indication information; or

And the information sending unit sends the DRS and the AC indication information on different resources, wherein the DRS carries or does not carry the information of the resources used by the AC indication information.

Alternatively,

the AC indication information comprises one or more of ACS identification information and AC identification information;

wherein the AC identification information comprises an AC index; or the AC identification information includes a DRS identification or a DRS sequence, and a one-to-one or many-to-one mapping relationship is provided between the DRS identification or the DRS sequence and an AC or AC index.

Alternatively,

the first network side equipment is a transmission node of a novel wireless access system, one or more transmission nodes form a transmission node cluster, and one transmission node cluster uses one or more ACs;

the AC indication information acquired by the information acquisition unit is used for indicating the currently available AC in the ACS to the terminal under the transmission node cluster where the transmission node is located.

The present embodiment further provides a second network-side device, as shown in fig. 4, including an access configuration set ACS sending module 30 and an auxiliary information sending module 40, where:

the ACS transmission module 30 includes:

an ACS sending unit, configured to send the acquired ACS to a terminal, for example, send the acquired ACS to the terminal as system information;

the auxiliary information sending module 40 includes:

an information obtaining unit, configured to obtain first auxiliary information and/or second auxiliary information, where the auxiliary information is used to assist a terminal in receiving a DRS, and includes, for example, one or more of information of resources used by the DRS, a transmission cycle of the DRS, and identification information of the DRS to be received; the second auxiliary information

Alternatively,

the ACS acquired by the ACS acquisition unit includes all ACS used in the network or includes all ACS used in a set area, where the set area includes a service area of one or more second network-side devices.

Alternatively,

the second network side device is a macro base station with a service area covering one or more transmission node clusters, and the macro base station is a macro base station in a traditional wireless access system or a novel wireless access system.

The above embodiment uses DRS bearer or indication AC indication information, and another embodiment is different from the above embodiment in that: the AC indication information is sent as an independent information unit and does not indicate the resource location in the DRS, the terminal may blindly detect the AC indication information, or the second network side device sends second auxiliary information used for receiving the AC indication information, such as information of resources used by the AC and/or a sending cycle of the AC, the second auxiliary information may be sent as system information, and the terminal receives the AC indication information sent by the first network side device according to the second auxiliary information. Accordingly, in this another embodiment, the information obtaining unit in the second network-side device auxiliary information sending module is further configured to obtain second auxiliary information for AC indication information reception, and the information sending unit is further configured to send the second auxiliary information.

Example two

In the first embodiment, transmission of ACS and AC indication information is described from a network side device, signal transmission is described from a terminal side in the present embodiment, and the network side device and a mode for sending ACS and AC are described in the first embodiment and are not repeated here.

As shown in fig. 5, the signal transmission method of the present embodiment includes:

step 210, a terminal receives an access configuration set ACS and access configuration AC indication information sent by a network side device, where the AC indication information is used to indicate a currently available AC in the ACS;

in this embodiment, the terminal receives AC indication information sent by the first network side device, where the AC indication information is carried or indicated by the DRS. Specifically, the terminal receives a DRS sent by the first network side device, and uses the DRS as the AC indication information; or, the terminal receives the DRS sent by the first network side device, and acquires the AC indication information from a load part of the DRS; or, the terminal receives the DRS sent by the first network side device, and receives the AC indication information according to the information of the resource used by the AC indication information carried by the DRS. In other embodiments, the terminal may also blindly detect the AC indication information; or the terminal receives the AC indication information according to second auxiliary information sent by a second network side device and used for receiving the AC indication information, where the second auxiliary information includes information of resources used by the AC and/or a sending period of the AC.

In this embodiment, when receiving a DRS, the terminal first receives first auxiliary information, which is sent by a second network side device and used for DRS reception, and receives the DRS according to the first auxiliary information, where the first auxiliary information may include one or more of the following information: information of resources used by the DRS, a sending period of the DRS, and identification information of the DRS to be received. The terminal may also receive the DRS through blind detection.

In this embodiment, the content of the AC indication information may be the same as that of the first embodiment, and includes one or more of ACs identification information and AC identification information, where the AC identification information includes an AC index; or the AC identification information includes a DRS identification or a DRS sequence, and a one-to-one or many-to-one mapping relationship is provided between the DRS identification or the DRS sequence and the AC or AC index. Correspondingly, when the terminal determines the currently available AC in the ACS according to the AC indication information, the terminal can directly select the currently available AC from the received ACS according to the AC identification information; or determining the currently available ACS in the received ACS according to the ACS identification information, and selecting the currently available ACS from the available ACS according to the AC identification information.

Step 220, the terminal determines the currently available AC in the ACS according to the AC indication information.

In this embodiment, the terminal receives system information sent by a second network side device, and obtains an ACS sent by the second network side device.

After receiving the ACS sent by the second network side device, the terminal may store the received ACS or update the originally stored ACS with the received ACS, and after receiving new AC indication information from the network side device, the terminal searches for a corresponding AC from the stored ACS according to the new AC indication information, and if the new AC indication information cannot be searched, then receives the ACS sent by the network side device and determines the AC corresponding to the new AC indication information.

And in a scene that the movement range of the terminal is limited, the terminal can realize access without replacing the AC, and at the moment, after the terminal determines the currently available AC in the ACS according to the AC indication information, the currently available AC can be stored and used in the next access.

In this embodiment, the first network side device is a transmission node of a novel wireless access system, one or more transmission nodes form a transmission node cluster, and one transmission node cluster uses one or more ACs; and the AC indication information is used for indicating the currently available AC in the ACS to the terminal under the transmission node cluster where the transmission node is located. The second network side device is a macro base station whose service area covers one or more TP clusters, and the macro base station may belong to a conventional wireless access system or a novel wireless access system.

The present embodiment further provides a terminal, including an AC processing module, as shown in fig. 6, where the AC processing module includes:

an information receiving unit 50, configured to receive an access configuration set ACS and access configuration AC indication information sent by a network side device, where the AC indication information is used to indicate an AC currently available in the ACS;

an information determining unit 60, configured to determine, according to the AC indication information, an AC currently available in the ACs.

Alternatively,

the information receiving unit receives AC indication information sent by network side equipment, and the AC indication information comprises: the terminal receives the AC indication information sent by the first network side equipment by adopting one of the following modes:

the information receiving unit blindly detects the AC indication information; or

The information receiving unit receives a Discovery Reference Signal (DRS) sent by the first network side device, and takes the DRS as the AC indication information; or

The information receiving unit receives a DRS sent by the first network side device, and acquires the AC indication information from a load part of the DRS; or

The information receiving unit receives a DRS sent by the first network side device, and receives the AC indication information according to the information of the resource used by the AC indication information carried by the DRS; or

The information receiving unit receives the AC indication information according to second auxiliary information which is sent by second network side equipment and used for receiving the AC indication information, wherein the second auxiliary information comprises information of resources used by the AC and/or sending cycles of the AC.

Alternatively,

the AC indication information received by the information receiving unit comprises one or more of ACS identification information and AC identification information;

the information determining unit determines the currently available AC in the ACS according to the AC indication information, and comprises the following steps: directly selecting a currently available AC from the received ACS according to the AC identification information; or determining a currently available ACS in the received ACS according to the ACS identification information, and selecting a currently available AC from the available ACS according to the AC identification information; wherein the AC identification information comprises an AC index; or the AC identification information includes a DRS identification or a DRS sequence, and a one-to-one or many-to-one mapping relationship is provided between the DRS identification or the DRS sequence and the AC or AC index.

Alternatively,

the receiving, by the information receiving unit, the DRS sent by the first network side device includes: the information receiving unit receives first auxiliary information which is sent by second network side equipment and used for receiving the DRS, and receives the DRS according to the first auxiliary information; the first auxiliary information includes one or more of information of resources used by the DRS, a transmission period of the DRS, and identification information of the DRS to be received.

Alternatively,

the information receiving unit receives the ACS sent by the network side equipment, and comprises: and the terminal receives system information sent by second network side equipment and acquires the ACS sent by the second network side equipment from the system information.

Alternatively,

the second receiving unit is further configured to save the determined currently available AC;

the terminal further comprises: and the uplink access module is used for performing uplink access by using the AC stored by the second receiving unit.

Alternatively,

the AC processing module further comprises an AC lookup unit:

the information receiving unit is also used for storing the received ACS or updating the originally stored ACS by using the received ACS, and informing the AC searching unit to search the AC after receiving new AC indication information;

the AC searching unit is used for searching the corresponding AC from the stored ACS according to the new AC indication information after receiving the notice that the information receiving unit searches the AC, and if the AC cannot be searched, the information receiving unit is notified;

the information receiving unit is further configured to receive the ACs sent by the network side device after receiving the notification that the AC searching unit cannot search, and notify the information determining unit to determine the AC corresponding to the new AC indication information.

Alternatively,

the first network side equipment is a transmission node of a novel wireless access system, one or more transmission nodes form a transmission node cluster, and one transmission node cluster uses one or more ACs; the AC indication information is used for indicating the currently available AC in the ACS to the terminal under the cluster where the transmission node is located;

the second network side device is a macro base station in a traditional wireless access system or a novel wireless access system, wherein the service area of the macro base station covers one or more transmission node clusters.

EXAMPLE III

The networking of this embodiment is the same as the first embodiment, and also includes a macro base station and a TP cluster in the macro base station service area, as shown in fig. 1. In the signal transmission method of this embodiment, the first network side device, such as the TP, is also used to send the AC indication information, the second network side device, such as the macro base station, is also used to send the ACs, and the sending method may also be the same as the first embodiment.

As shown in fig. 7, the signal transmission method of the network side device in this embodiment includes:

step 310, a first network side device sends AC indication information and an ACS to a terminal, wherein the AC indication information is used for indicating a currently available AC in the ACS to the terminal;

the method for sending the AC indication information by the first network side device is the same as that in the first embodiment, and is not described again.

In this embodiment, the first network side device sends one or more ACS to the terminal. Specifically, the first network side device sends a DRS, and the ACS is carried in a load part of the DRS; or, the first network side device sends DRS and the ACS on different resources, where the DRS may or may not carry information of resources used by the ACS.

In step 320, the second network side device sends one or more ACS to the terminal.

In this embodiment, the second network side device sends the ACS as system information to the terminal. Meanwhile, the second network side device may send, to the terminal, the first assistance information for DRS reception and/or the second assistance information for AC indication information reception. The first auxiliary information and the second auxiliary information may be the same as in embodiment one. In this embodiment, when the DRS signal and the ACS are sent on different resources, the second network side device may further send, to the terminal, third auxiliary information for the ACS sent by the first network side device to receive, where the third auxiliary information includes one or more of the following information: the information of the resources used by the ACS, the sending period of the ACS and the identification information of the ACS to be received.

The present embodiment further provides a first network-side device, as shown in fig. 8, including an AC indication module 70 and an ACs sending module 80, where the AC indication module 70 is the same as the AC indication module in the first embodiment, and is not described again. The ACS transmission module 80 includes:

and the ACS sending unit is used for sending the acquired ACS to a terminal.

Alternatively,

the ACS sending unit sends the ACS to a terminal, including: the ACS sending unit sends a DRS, and the ACS is carried by a load part of the DRS; or, the ACS sending unit sends DRSs and the ACS on different resources, where the DRSs carry or do not carry information of resources used by the ACS.

The present embodiment further provides a second network-side device, which includes an ACS sending module, and may further include an auxiliary information sending module, where the two modules may be the same as the modules in the first embodiment. In particular, in this embodiment, the information obtaining unit in the auxiliary information sending module may further obtain third auxiliary information for ACS sending and receiving by the first network-side device, and the information sending unit in the auxiliary information sending module may further send the third auxiliary information to the terminal.

For example, in a networking environment that does not include a second network-side device such as a macro base station, the ACS and the auxiliary information cannot be sent by the second network-side device, but at this time, the ACS and the AC indication information may be sent by the first network-side device, and the manner for sending the ACS and the AC indication information by the first network-side device may be the same as that of this embodiment.

Example four

In the third embodiment, transmission of ACS and AC indication information is described from the network side device, transmission of these signals is described from the terminal side in the present embodiment, and the network side device and its manner of sending ACS and AC are described in the third embodiment and will not be repeated here.

As shown in fig. 9, the signal transmission method of the terminal of the present embodiment includes:

step 410, the terminal receives AC indication information sent by the first network side device and an ACs sent by the second network side device or the first network side device, where the AC indication information is used to indicate a currently available AC in the ACs;

in this embodiment, the manner in which the terminal receives the AC indication information may be the same as that in the embodiment, and for receiving the ACs, the terminal preferentially establishes a connection with the second network side device, receives the system information sent by the second network side device and obtains the ACs therefrom, and if the connection cannot be established or the ACs cannot be obtained, receives the ACs sent by the first network side device.

The terminal may receive the ACS sent by the first network side device by one of the following methods:

receiving the ACS sent by the first network side equipment through blind detection;

receiving a DRS sent by the first network side device, and acquiring the ACS from a load part of the DRS;

receiving a DRS sent by the first network side device, and receiving the ACS according to the information of the resource used by the ACS, which is carried by the DRS;

receiving third auxiliary information sent by a second network side device and used for receiving by an ACS sent by a first network side device, and receiving the ACS according to the third auxiliary information, wherein the third auxiliary information includes one or more of the following information: the information of the resources used by the ACS, the sending period of the ACS and the identification information of the ACS to be received.

For the reception of the DRS, the same manner as the embodiment may be adopted.

And step 420, the terminal determines the currently available AC in the ACS according to the AC indication information.

This step and its subsequent processing may be the same as step 220 in the second embodiment.

The embodiment also provides a terminal, which comprises an AC processing module, wherein the AC processing module comprises an information receiving unit and an information determining unit. The functions of these two units differ from the second embodiment in that: when the information receiving unit receives the ACS sent by the network side equipment, the information receiving unit preferentially establishes connection with second network side equipment, receives system information sent by the second network side equipment and obtains the ACS from the system information, and if the connection cannot be established or the ACS cannot be obtained, the information receiving unit receives the ACS sent by the first network side equipment.

The information receiving unit may receive the ACS sent by the first network side device by one of the following methods:

In another embodiment in a networking environment that does not include a second network-side device, such as a macro base station, the ACS and the auxiliary information cannot be sent by the second network-side device, and the terminal cannot receive the ACS and the auxiliary information sent by the second network-side device. At this time, the terminal side may receive the ACS and the AC sent by the first network side device, for example, the ACS and the AC sent by the TP, and the terminal may receive the ACS and the AC sent by the first network side device in a blind detection manner or a DRS-based manner in this embodiment, in addition to a receiving manner based on the auxiliary information sent by the second network side device.

The following is a description by way of example in the application.

Example 1

This example illustrates signaling of AC and ACS. In this example, in a specific area of the system, preferably, in a macro base station service area, there are multiple clusters of transmission nodes TP, each TP cluster includes one or more TPs, when a TP cluster includes multiple TPs, only one TP or a part of TPs (one or more TPs but not all TPs) in the cluster may transmit DRS signals, and other TPs without traffic demand are dormant, and an access request message for detecting a terminal on a specified resource by the dormant TP is also referred to as MSG1 and does not transmit signals. In another example, the TP that is not dormant may also transmit the DRS and the system information, and the TP that is dormant may not transmit the system information, and may transmit or not transmit the DRS, thereby achieving power saving and interference reduction. The terminal triggers an uplink access process by detecting the DRS signal, and awakens a proper TP to provide service transmission for the terminal. TP is transmitted when the user has the service, and the TP continues to sleep after the service is transmitted, so that the TP is transmitted when the user has the requirement, and the TP sleeps when the user does not have the requirement.

Fig. 1 shows an exemplary UDN networking with 2 TP clusters in a Macro base station (Macro eNB) area. There are 3 TPs in cluster 1, where TP11 transmits DRS signals and provides traffic transmission for UE1 and UE3, and TP12 responds to access requests from UE2 and provides traffic transmission to UE 2. TP13 sleeps without transmitting any signals. 1 TP in cluster 2 transmits DRSs and provides traffic transmission for UE 2. Although only one macro base station and its area are shown in the figure, the present invention may be applied to a network comprising a plurality of macro base stations, each macro base station area comprising one or more TP clusters, each cluster having one or more TPs. And configuring one or more ACs for each TP cluster, wherein the ACs are used when the UE under the TP cluster accesses the TP in the cluster, and the identification information of the ACs configured for the TP cluster is sent by the TP which transmits DRS signals in the TP cluster.

The resources required for the terminal to initiate the uplink access are stored in the AC, and preferably, the terminal needs to read an access configuration set ACs (access configuration sets, hereinafter referred to as ACs) and search for a currently available AC to obtain the resources required for the uplink access. The ACS may contain all or a partial subset of the ACS in the network, for example, the ACS shared by the macro base station and the TPs in a certain area is divided into one or more ACS, and transmitted by the macro base station or the TPs in the area, and multiple TP clusters such as non-adjacent TP clusters may also multiplex the same AC. As shown in fig. 1, eNB1, cluster 1, and cluster 2 share an ACS for which a terminal in an area detects a macro base station. Each AC in the ACS includes resources used by Message 1(Message1, MSG1), such as sequence resources and time-frequency domain resources used by an access request Message sent by the terminal. Preferably, each AC further includes information of resources used by Message 2(Message2, MSG2 for short) and control channel configuration thereof, and MSG2 refers to a response Message sent by the network side device in response to the access request Message sent by the terminal. After the terminal acquires the AC, preferably, an uplink preamble sequence range is found and a preamble sequence is randomly selected, and uplink access is initiated on a time-frequency resource designated by the AC, namely, MSG1 is sent. The transmitting node receiving the MSG1 transmits a response message, i.e., MSG2, according to the corresponding AC information.

Preferably, the DRS consists of a DRS sequence and a DRS load. The load may be variable and may be 0. In another example, when there is a mapping relationship between a DRS sequence or a DRS identifier and an AC or ACI, the DRS sequence or the DRS identifier may also be used as the AC indication information.

The DRS load may be transmitted on different resources from the DRS sequence, where the different resources are non-contiguous time domain resources, frequency domain resources, time frequency domain resources, or space domain resources. The DRS sequence may carry the DRS sequence, and may also carry DRS identification (DRS ID) and other information, such as a location indication of a transceiving area in a subframe. The ACS ID, ACI, ACS may also be transmitted as an independent signal cycle, and preferably, the information of the resource used by the ACS is further indicated by a macro base station system message or DRS.

In this example, the DRS may implement the AC indication function, but the function of the DRS is not limited thereto. Besides, the method can also be used for cell discovery, coarse synchronization, channel estimation, channel measurement, carrying and sending system configuration information and the like. These effects can also be achieved by the ACS, where appropriate corresponding information can be defined.

For a dual-connection scene, the terminal is always connected with the macro base station, and ACS information can be directly acquired at the macro base station. When the LTE system and the new RAT system coexist, the macro base station may be a macro base station of LTE or a macro base station of the new RAT system. When both are new RAT systems, the macro base station is a new RAT system. If the macro base station is LTE macro base station, obtaining system information by using an LTE mode so as to obtain an ACS; if the new RAT macro base station is, acquiring the access configuration ACS according to the new RAT mode, preferably, the acquiring the ACS from the new RAT mode may be detecting system information of the connected new RAT macro base station, acquiring ACS information on a specified resource (for example, agreeing a resource location in a protocol), or acquiring DRS indication information (for example, indicating whether there is a DRS or not, a resource used by the DRS, and the like) transmitted by the new RAT macro base station.

For a single-connection scene, the terminal can access the macro base station first, and acquire ACS information of the macro base station in a mode similar to a double-connection macro base station. The terminal may also locally store ACS information acquired from the macro base station, and preferably, the terminal may store ACS of a Cell corresponding to one or more Physical Cell Identifiers (PCIs), and in a scenario such as terminal switching, the terminal may search for an AC indicated by new AC indication information in the stored ACS, and receive the new ACS when the AC indication information is not searched.

Preferably, for a case that the terminal is always connected to the macro base station or is connected to the macro base station first, the terminal may further obtain auxiliary information for DRS reception from the macro base station, such as resources of DRS, a period of DRS, ID information of DRS to be received, and the like. The terminal can determine when to detect the DRS on which resource after obtaining the information, and because the range of the DRS ID is known, the blind test times of the DRS can be reduced, and the complexity of the blind test is reduced. For example, the maximum value of DRS ID is 256, and the range of DRS ID required to be detected is 65-128, which reduces the blind detection range by three quarters, and makes the detection speed and detection accuracy of the terminal higher.

For the situation that the terminal cannot acquire information from the macro base station in a single connection, after the terminal obtains the DRS through blind detection, preferably, the ACS can be acquired according to the DRS. The manner of obtaining the ACS may be detecting the ACS used by the ACS indicated by the DRS, or obtaining the ACS from the load part of the DRS. The resources herein include one or more of time domain resources, frequency domain resources, and spatial domain resources.

It should be noted that, according to different actual networking scenarios, the terminal may detect the ACS first, then detect the DRS signal, and may also detect the DRS signal first and then detect the ACS. For example, the terminal connects the macro base station to obtain the ACS, and then detects the DRS signal; or the terminal detects DRS signals firstly and then detects the ACS of the macro base station; or, the terminal detects the DRS signal first and then detects the ACS resource according to the DRS indication or acquires the ACS from the load of the DRS signal.

Since DRSs are only transmitted on a part of TPs of each TP cluster, the ACS may also select different network layers such as only transmitting on the macro base station, and both transmission frequencies are relatively low. The mechanism ensures that the system is green and energy-saving, has low system overhead, obviously reduces the inter-cell interference and is very suitable for a 5G system, particularly a ultra-dense cell UDN system.

Example two

The present example illustrates the manner in which ACS indication and acquisition is performed.

When the macro base station sends the auxiliary information for ACS receiving, the terminal can detect the system information sent by the macro base station and obtain the ACS from the system information; the system information of the macro base station may further include information that the auxiliary terminal receives the DRS, such as a transmission period of the DRS and a range of the DRS ID to be received; the system information of the macro base station may further include information that the auxiliary terminal receives the ACS, such as the transmission cycle of the ACS, the resource of the ACS, and the ID of the ACS to be received.

When the terminal cannot or cannot obtain the ACS in a macro base station assisted manner, the terminal may detect the DRS sent by the TP to obtain ACS information. For example, when the terminal does not detect the ACS from the macro base station, the terminal acquires information of resources used by the ACS from the detected DRS signal and detects the ACS on corresponding resources; or when the terminal does not detect the ACS from the macro base station, the ACS is obtained by decoding the detected load part of the DRS.

Example three

This example is used to illustrate the lookup of an AC, i.e., determining the currently available AC.

The following illustrates the AC reading scheme, depending on the actual implementation:

the first method is as follows:

fig. 11 shows two ACS, each having multiple DRS IDs and ACS, one AC for each DRS ID, and possibly multiple DRS IDs for each ID. DRS IDs of different ACS are staggered, and AC staggering of DRS IDs corresponding to different ACS is guaranteed. In this way, the DRS ID is also used as an ACI (which may be replaced with an ACI), and only the AC corresponding to the ACS table needs to be searched according to the DRS ID.

The second method comprises the following steps:

fig. 12 shows two ACS, one ACS for each ACS ID, multiple DRS IDs in each ACS, one AC for each DRS ID, but the same DRS ID may be multiplexed in different ACS. In this way, the corresponding ACS needs to be found according to the ACS ID, and then the corresponding AC needs to be found according to the DRS ID (or ACI).

The third method comprises the following steps:

in this way, each ACS ID corresponds to one ACS, each ACS has multiple ACIs, one ACI is mapped to one AC, and meanwhile, there is a mapping relationship between DRS ID and ACI (which may be agreed in a standard/protocol or configured in a system). In order to make the user have more uplink resources, different DRS IDs may correspond to the same ACI. This approach requires first finding the ACS to which the ACS ID corresponds. If the ACI is known, the corresponding AC is looked up according to the ACI. If the ACI is unknown, the corresponding ACI is found through the DRS ID, and then the corresponding AC is found according to the ACI.

If the terminal finds a plurality of ACs according to the AC indication information, the terminal can decide which set of AC to use by itself, for example, the terminal can select preferentially according to the signal strength of the received AC indication information.

Example four

This example illustrates the way in which a terminal acquires an ACS

The terminal may obtain one or more ACS in various manners, for example, the terminal detects a macro base station corresponding to one or more PCIs of the LTE to obtain one or more ACS; or the terminal detects a macro base station of the new RAT system to obtain one or more ACS; alternatively, the terminal detects the TP (e.g., low power base station or relay station) to obtain one or more ACS.

The terminal can locally store the ACS with the ACS ID, after new AC indication information is detected, if the AC indication information comprises the ACS ID, whether the ACS with the same ACS ID exists is searched locally, if yes, the ACS is used as an available ACS, and then the currently available ACS is searched from the available ACS according to the ACI (or DRS ID and the like). If the AC indication information only comprises the ACI and the ACIs in different ACSs are different, searching whether the ACS with the same ACI exists in the local ACS, and if so, using the searched AC with the ACI as the currently available AC. And if the currently available AC is not found, acquiring a new ACS through detection, and then searching the AC in the new ACS.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method of signal transmission, comprising:

the method comprises the steps that a first network side device sends access configuration AC indication information to a terminal, wherein the AC indication information is used for indicating a currently available AC in an access configuration set ACS to the terminal;

the AC indication information is used for indicating the currently available AC in the ACS to the terminal under the transmission node cluster where the transmission node is located;

when the transmission node cluster comprises a plurality of transmission nodes, only one transmission node or part of the transmission nodes in the cluster transmits a DRS signal, other transmission nodes without service requirements are dormant, the DRS signal is not transmitted, and the dormant transmission nodes are awakened after detecting an access request message of a terminal on resources specified by the AC; or

When the transmission node cluster comprises a plurality of transmission nodes, only one transmission node or part of the transmission nodes in the cluster transmits DRS signals and system information, other transmission nodes without service requirements are dormant, do not transmit the system information, and transmit or do not transmit the DRS signals, and the dormant transmission nodes are awakened after detecting the access request message of the terminal on the resources specified by the AC.

2. The method of claim 1, comprising:

the first network side device sends AC indication information to a terminal, and the AC indication information comprises:

the first network side device sends a Discovery Reference Signal (DRS), and the DRS is used as the AC indication information; or

The first network side device sends a Discovery Reference Signal (DRS), and the AC indication information is carried in a load part of the DRS; or

3. The method of claim 2, comprising:

the method further comprises the following steps: the second network side equipment sends first auxiliary information used for DRS receiving to the terminal, wherein the first auxiliary information comprises one or more of the following information: information of resources used by the DRS, a transmission period of the DRS, and identification information of the DRS to be received.

4. The method of claim 1, comprising:

the method further comprises the following steps: and the second network side equipment sends second auxiliary information for receiving the AC indication information to the terminal, wherein the second auxiliary information comprises information of resources used by the AC and/or a sending period of the AC.

5. The method of claim 1, comprising:

the AC indication information includes one or more of ACS identification information and AC identification information.

6. The method of claim 5, comprising:

the AC identification information comprises an AC index; or

The AC identification information comprises a DRS identification or a DRS sequence, and one-to-one or many-to-one mapping relation is formed between the DRS identification or the DRS sequence and an AC or AC index.

7. The method of any of claims 1-6, comprising:

and the second network side equipment and/or the first network side equipment sends one or more ACS (auto-configuration server) to the terminal.

8. The method of claim 7, comprising:

the first network side device sends one or more ACS to a terminal, including:

the first network side equipment sends a DRS, and the ACS is carried by the load part of the DRS; or

And the first network side equipment sends the DRS and the ACS on different resources, wherein the DRS carries or does not carry the information of the resources used by the ACS.

9. The method of claim 7, comprising:

the first network side device sends one or more ACS:

the method further comprises the following steps: the second network side equipment sends third auxiliary information to the terminal, wherein the third auxiliary information is used for ACS (auto-configuration server) receiving sent by the first network side equipment, and the third auxiliary information comprises one or more of the following information: the information of the resources used by the ACS, the sending period of the ACS and the identification information of the ACS to be received.

10. The method of claim 7, comprising:

the second network side device sends one or more ACS to the terminal, including: and the second network side equipment sends the ACS as system information to a terminal.

11. The method of claim 7, comprising:

the ACS sent by the second network side device to the terminal includes all ACS used in the network, or includes all ACS used in a set area, where the set area includes a service area of one or more second network side devices.

12. The method of claim 7, comprising:

13. The method of any of claims 1-6, 8-12, comprising:

the AC includes resource information of a first resource and resource information of a second resource; the first resource is a resource used by the terminal for sending an access request message, and the second resource is a resource used by a response message sent by the first network side device in response to the access request message of the terminal; the resource information is used for indicating the actual used resources of the message or the resource range where the actual used resources are located, and the resources comprise at least one of time domain resources, frequency domain resources, space domain resources and code domain resources.

14. The method of claim 13, comprising:

the resource information of the second resource is implicitly indicated through the resource information of the first resource and the appointed position relation between the second resource and the first resource.

15. The method of claim 8, wherein:

the DRS is a DRS in a novel wireless access system, and is used for one or more of AC information indication, cell discovery, channel estimation, channel measurement and coarse synchronization; and/or

The AC indication signal is used for coarse synchronization.

16. A method of signal transmission, comprising:

the terminal determines the currently available AC in the ACS according to the AC indication information;

the network side equipment comprises transmission nodes of a novel wireless access system, one or more transmission nodes form a transmission node cluster, and one transmission node cluster uses one or more ACs;

17. The method of claim 16, comprising:

the terminal receives AC indication information sent by network side equipment, and the method comprises the following steps: the terminal receives the AC indication information sent by the first network side equipment by adopting one of the following modes:

the terminal blindly detects the AC indication information; or

The terminal receives a Discovery Reference Signal (DRS) sent by the first network side device, and takes the DRS as the AC indication information; or

The terminal receives the DRS sent by the first network side device, and acquires the AC indication information from a load part of the DRS; or

The terminal receives the DRS sent by the first network side device, and receives the AC indication information according to the resource information used by the AC indication information carried by the DRS; or

The terminal receives the AC indication information according to second auxiliary information which is sent by second network side equipment and used for receiving the AC indication information, wherein the second auxiliary information comprises information of resources used by the AC and/or a sending period of the AC;

the first network side device is a transmission node of a novel wireless access system.

18. The method of claim 17, comprising:

the terminal receives first auxiliary information which is sent by second network side equipment and used for receiving the DRS, and receives the DRS according to the first auxiliary information, wherein the first auxiliary information comprises one or more of the following information: information of resources used by the DRS, a sending period of the DRS, and identification information of the DRS to be received.

19. The method of claim 17, comprising:

the terminal determines the currently available AC in the ACS according to the AC indication information, and the method comprises the following steps:

the terminal directly selects available ACs from the received ACS according to the AC identification information; or

And the terminal determines the currently available ACS in the received ACS according to the ACS identification information, and then selects the currently available AC from the available ACS according to the AC identification information.

20. The method of claim 19, comprising:

the AC identification information comprises an AC index; or

21. The method of claim 17, comprising:

and the AC indication information is used for indicating the currently available AC in the ACS to the terminal under the transmission node cluster where the transmission node is located.

22. The method of any one of claims 17-21, comprising:

the ACS that the terminal receiving network side equipment sent includes: the terminal receives system information sent by second network side equipment, and acquires an ACS (auto-configuration server) sent by the second network side equipment; or

The ACS that the terminal receiving network side equipment sent includes: the terminal receives the ACS sent by the first network side equipment in one of the following modes:

23. The method of claim 22, comprising:

when receiving the ACS sent by the network side equipment, the terminal preferentially establishes connection with the second network side equipment, receives the system information sent by the second network side equipment and obtains the ACS from the system information, and if the connection cannot be established or the ACS cannot be obtained, the terminal receives the ACS sent by the first network side equipment.

24. The method of claim 22, comprising:

25. The method of any of claims 17-21, 23-24, comprising:

after receiving the ACS sent by the network side device, the terminal further includes:

and the terminal stores the received ACS or updates the originally stored ACS by using the received ACS, after receiving new AC indication information from network side equipment, firstly searches the corresponding AC from the stored ACS according to the new AC indication information, and if the AC cannot be searched, then receives the ACS sent by the network side equipment and determines the AC corresponding to the new AC indication information.

26. The method of claim 22, wherein:

after the terminal determines the currently available AC in the ACS according to the AC indication information, the method further comprises the following steps: and the terminal saves the currently available AC and uses the AC at the next access.

27. The method of any of claims 16-21, 23-24, 26, comprising:

28. The method of claim 22, comprising:

the DRS is a DRS in a novel wireless access system, and is used for one or more of AC information indication, cell discovery, channel estimation, channel measurement and coarse synchronization, and/or

The AC indication signal is used for coarse synchronization.

29. A first network-side device, comprising an AC indication module, wherein the AC indication module comprises:

an information sending unit, configured to send the AC indication information to a terminal;

the first network side device is a transmission node of a novel wireless access system, one or more transmission nodes form a transmission node cluster, and one transmission node cluster uses one or more ACs;

30. The first network-side device of claim 29, comprising:

31. The first network-side device of claim 29, comprising:

32. The first network-side device of any of claims 29-31, comprising:

the first network side device further includes an access configuration set ACS sending module, where the ACS sending module includes:

and the ACS sending unit is used for sending the acquired ACS to a terminal.

33. The first network-side device of claim 32, comprising:

the ACS sending unit sends the ACS to a terminal, including:

the ACS sending unit sends a DRS, and the ACS is carried by a load part of the DRS; or

And the ACS sending unit sends the DRS and the ACS on different resources, wherein the DRS carries or does not carry the information of the resources used by the ACS.

34. The first network-side device according to any of claims 29-31, 33, comprising:

35. The first network-side device according to any of claims 30-31, 33, wherein:

The AC indication signal is used for coarse synchronization.

36. A second network side device, comprising an access configuration set ACS sending module and/or an auxiliary information sending module, wherein:

the ACS sending module includes:

an ACS sending unit, configured to send the acquired ACS to a terminal;

the auxiliary information sending module comprises:

the information acquisition unit is used for acquiring auxiliary information, wherein the auxiliary information is used for assisting a terminal to receive one or more of a Discovery Reference Signal (DRS), an Access Configuration (AC) and an Access Configuration (ACS) so that the terminal receives AC indication information sent by network side equipment according to the auxiliary information;

an information sending unit, configured to send the acquired auxiliary information to a terminal;

wherein the AC indication information is used for indicating the currently available AC in the ACS;

37. The second network-side device of claim 36, wherein:

the ACS sending unit sends the acquired ACS to a terminal, and the ACS sending unit comprises: and the ACS sending unit sends the acquired ACS as system information to a terminal.

38. The second network-side device of claim 36, wherein:

39. The second network-side device of claim 36, wherein:

the auxiliary information includes one or more of first auxiliary information, second auxiliary information, and third auxiliary information; wherein:

the first auxiliary information is used for assisting the terminal to receive the DRS and comprises one or more of information of resources used by the DRS, a transmission period of the DRS and identification information of the DRS to be received;

the second auxiliary information is used for assisting the terminal to receive the access configuration AC, and comprises the information of the resources used by the AC and/or the sending period of the AC;

the third auxiliary information is used for the auxiliary terminal to receive the ACS, and comprises one or more of information of resources used by the ACS, a sending period of the ACS and identification information of the ACS to be received.

40. The second network-side device of any of claims 36-39, wherein:

41. The second network-side device of any of claims 36-39, wherein:

42. The second network-side device of any of claims 36-39, wherein:

The AC indication signal is used for coarse synchronization.

43. A terminal comprising an AC processing module, the AC processing module comprising:

an information determination unit, configured to determine, according to the AC indication information, an AC currently available in the ACs;

44. The terminal of claim 43, wherein:

45. The terminal of claim 44, wherein:

46. The terminal of claim 43, wherein:

the information determining unit determines the currently available AC in the ACS according to the AC indication information, and comprises the following steps: selecting a currently available AC from the received ACS directly according to the AC identification information; or determining a currently available ACS in the received ACS according to the ACS identification information, and selecting a currently available AC from the available ACS according to the AC identification information;

wherein the AC identification information comprises an AC index; or the AC identification information comprises a DRS identification or a DRS sequence, and one-to-one or many-to-one mapping relation is formed between the DRS identification or the DRS sequence and an AC or AC index.

47. A terminal according to any of claims 44-46, characterised in that:

the information receiving unit receives the ACS sent by the network side equipment, and comprises: the terminal receives system information sent by second network side equipment, and acquires an ACS (auto-configuration server) sent by the second network side equipment;

or

The information receiving unit receives the ACS sent by the network side equipment, and comprises: the terminal receives the ACS sent by the first network side equipment in one of the following modes:

48. The terminal of claim 47, wherein:

when the information receiving unit receives the ACS sent by the network side equipment, the information receiving unit preferentially establishes connection with the second network side equipment, receives the system information sent by the second network side equipment and obtains the ACS from the system information, and if the connection cannot be established or the ACS cannot be obtained, the information receiving unit receives the ACS sent by the first network side equipment.

49. The terminal of claim 47, wherein:

the information receiving unit is further configured to save the determined currently available AC;

the terminal further comprises: and the uplink access module is used for performing uplink access by using the AC stored by the information receiving unit.

50. The terminal of any of claims 43-46, 48-49, wherein:

the AC processing module further comprises an AC lookup unit:

51. The terminal of any of claims 44-45, 48-49, wherein:

52. The terminal of any of claims 43-46, 48-49, wherein:

53. The terminal according to any of claims 44-46, 48-49, characterized by:

The AC indication signal is used for coarse synchronization.